Railway truck structure



July 25, 1939. H. M. PFLAGER RAILWAY TRUCK STRUCTURE 2 Sheets-Sheet 1Filed Sept. 19, 1958 I I I! 4 INVENTOR HARRY M PFLAGER ATTORNEY July 25,1939. PFLAGER 2,167,125

RAILWAY TRUCK STRUCTURE Filed Sept. 19, 1938 2 Sheets-Sheet 2 FIG. 3'

INVENTOR HARRY M. PFLAGER ATTORNEY Patented July 25, 1939 UNITED STATESPATENT OFFICE 2,101,125 RAILWAY 'rnucx s'rauc'runa Application September19, 1938, Serial No. 230,532

12 Claims. (01. 1l5197) The invention relates to railway rolling stockand particularly to truck chafing plates, and associated structure, suchas may be provided on relatively movable transom and bolster parts.

It has been the general practice to bolt or rivet the chafing plates onthe truck bolster and the truck frame to prevent wear upon the bolsterand truck frame. These plates, due to constant relative movement of thetruck bolster and truck frame, wear rapidly and when worn allow thebolster to play back and forth producing rough riding and noise due tothe bolster and frame chafing plates striking together which is very ob-J'ectionable in the car and therefore the plates have to be renewed fromtime to time to maintain the clearance between the truck parts at aminimum, thereby preventing excessive jars and shocks due to braking,pulling, and bufilng forces.

The main object of the present invention is to 90 provide mechanismwhich can be readily adjusted while the car is in service to maintainthe desired clearance between the bolster and transom at all timeswithout taking the trucks from under the car or disassembling same.Obviously it is desired also to retain the objectives of the ordinarychafing plates which have been used heretofore.

In the accompanying drawings fllustrating the invention- Figure l is atop view of one end of a railway truck bolster and the adjacent portionof the truck frame and including the novel chafing plate structure.

Figure 2 is a vertical transverse section taken on the section line 2-2of Figure 1.

Figure 3 is'a vertical section and elevation taken on the line 3-4 ofFigure 1.

Figure 4 is a detail drawn to a large scale showing the adjustablechafing plate structure in elevation.

Figure 5 is a similar detail view illustrating another form of theinvention.

Figure 6 is a vertical section taken on the line 66 of Figure 5.

The truck frame shown in Figures 1 to 4, inclusive, includes a sidemember or wheel piece I, and transverse transoms 2 and 3. Preferablythese parts are of box-section and merge with each other, being fonnedby a one-piece casting. It will be understood that this frame issupported upon the truck wheels and axles in the usual manner and theseparts are not illustrated as they form no part of the present invention.

Positioned between transoms 2 and 3 is a boxshaped bolster 4, includinga center plate 5 adapted to mount the car body in the usual manner.

Bolster 4 is supported by bolster springs 6 carried by the usual truckspring plank 'l. Transom 2 is provided near its end with a circular hosI facing towards the bolster and having its face in the form of a fiathelix inclined from the plane 5 extending perpendicularly to thelongitudinal center line of the truck. Boss I is provided with a centralcircular recess 9, and a circular platelike member It has acorresponding trunnion ll seated in recess 9. The face of member llfacl0 ing boss I has a flat helical contour, and the face of member l0opposing the bolster is parallel to the bolster wall. A bolt l2 extendsthrough member ill and the adjacent transom wall, and the coil spring I3is compressed between the 15 inner face of the wall and a nut ll forminga shoulder on the inner end of the bolt.

Elements 9, II and I2 so mount member III on member 8 that member I! mayrotate on its axis and, because of the opposing helical faces, 20 bemoved longitudinally of the bolt and transversely of the transom to takeup any play between the transom and the bolster. Preferably the bolsteris provided with a wear plate is abreast of member I 0 and this wearplate will be 25 of relatively hard metal so that it will standconsiderable frictional contact with member ll before it becomesnecessary to renew the wear plate. 7

Projecting upwardly beyond the circular pe- 3o riphery of member 8 is anelongated lug or ear I6 having a series of apertures ll. Projectingupwardly beyond the circular periphery of member 10 are one or more lugsor ears l8 and I! each having an aperture adapted to be alined 35 withone of the apertures I'I in lug IS. A bolt 22 may be passed through theaperture in the rotatable member lug and a selected one of the aperturesin the stationary member lug to hold the relatively movable parts indesired relation.

It will be understood that bolt I9 is accessible from the side of thetruck, and upon its removal member ll may be rotated on bolt l2 by anoperator at the side of the truck to shift the members angularly, andaxially, of each other to vary the 5 overall width of the chafing platestructure or, in Y other words, to vary the bolster clearance distancebetween transoms 2 and 3.

Transom 3 and the adjacent portion of bolster l are shown as havingordinary wear plates 2| 0 and 2| secured in position and serving toreduce wear upon the bolster and transom, respectively.

In view of the adjustment provided by the chafing plate at the oppositeside of the bolster, it will be unnecessary to replace elements 2. and2| for clearance purposesdue to wear or to make them adjustable in anymanner. The width of lug II on the base member of-the chafing plate andthe spacing of lugs i8 and I! on the movable member provides for totalrotating movement of 90 between the parts when shifted from the positionshown in Figure 3 to the position shown in Figure 4, at which thebearing area between the two parts-wilYbe three-quarters of their totalarea as indicated by the are 23 in Figure 4.

By providing the bottom plate as a part of the transom or bolster wall,less space will be required for the complete device than wouldberequired if the two parts were formed separateLv from the, bolster andtransom and applied thereto. How-v ever, the latter construction may bepreferred, particularly if it is desired to equip old trucks,

and Figures 5 and 6 illustrate such a formof the invention. In thesefigures the device is shown as comprising a separately formed base plateII and an outer plate II, the base plate being applied to the transomwall and secured by welding as indicated at W, or it may be riveted inplace. The bolt II and spring 34 function the same as bolt I! previouslydescribed. In this formof'the invention the'opposing faces of the partsBI and ii comprise two helical sections each extending 180 about theaxis of the device and whenthe two parts have been rotated to their"maximum'ofiset position, the bearing area between the-plates will beone-half of the total area as indicated by the arcs I! in Figure 5.

It will be understood that the complementary plates'with inclinedbearing faces may heapplied as a unit to the bolster as well as to the.

transom. If desired, the chafing plate assembly either in theformof, aseparate unit or as including the truck part as one element, may beprovided on both sidesf'of the bolster although ordinarily theapplication to one side as shown inFigllrelissuillcient,

The general objectives indicated in the introductory portion of thisspecification are readily attained by the structures described, butit-will be apparent to thoseskilled in the art that variav tions in thedetails may be made without de-.

parting from the spirit of the invention and exclusive use of'suchmodifications as come within the scope of the claims is contemplated. VWhat is claimed is: v

1. In a railway truck, atruck frame part and a bolster part movablerelative to each other and opposing each other longitudinallyofthetruck, chafing plate structure for taking thrusts between said parts,said structure comprising a member in fixed relation to oneof said truckparts and a cooperating member rotatable on said first-mentioned memberabout an axisextending transversely of said truck parts, said membershaving helix-like opposing disk faces whereby their relative rotationvaries the extent" of said structure transversely of said parts, and.

means for positively holding said members against accidental relativemovement. or 2. In combination,-a.railway truck frame part,

a relatively movable truck bolster part extending alongside thereof,chafing plate structure an one of said parts, said structure includingrelatively rotatable members one bearing on the other with theirinter-engaging faces shaped to vary the extent of the structuretransversely of said parts when rotated relatively to each other therebeing means in said structure for holding said members against relativerotation, said structure being accessible from the side of the truck foreffecting relative rotation of said members.

3. In combination, a railway vehicle truck frame part, a relativelymovable truck bolster part extending alongside thereof, chafing platestructure, said structure comprising a member in fixed relation to oneof said truck parts and a cooperating member rotatable on saidfirstmentioned member about anfjfaxis extending transversely of saidtruck parts, said"'rnembers having helix-like opposing faces wherebytheir relative rotation varies the extent of said structure transverselyof said parts, there being means for holding said members againstrotation from the desired adjustment.

14. In combination;" a railway vehicle truckframe'part, a truck bolsterpart extending alongside'thereof, a chafing'plate device comprising aplate-like member on one of said truck parts and a cooperatingplate-like member rotatable on said first-mentioned member about anaxisextending transversely of said truck parts, said members havinghelix-like opposing faces whereby their: v

relative rotation varies the overall thickness of the device,saidmembers having cooperating' lugs projecting from said opposingfaces, there being.

a series of apertures in at-least one of said lugs for receiving anelement projecting from the other of said lugs to hold, the members'i'ndesired position.

side thereof, a chafing plate device comprising'a I '30 5. Incombination, a railway vehicle truck 1 frame part, a truck bolster partextending alongbase member on one of said truck parts and a contactmember, said base member having a helix-like face and a circular recessat theaxisof said face, and said contact member having a cooperatinghelix-like face bearing on said basev memberface and having'a bossseatedin said recess, whereby said contact memberis mounted on said basemember to rotate aboutthe axis of said helix to vary the overaliextentof saiddevice, there being means for holding said-members' againstrotation from the desired adjust,- ment.

frame part, a truck bolster part extending along- 7 side thereof, achafing plate device comprising a.-

member on one of said truck parts and a contact member, said base memberhaving a.

helix-like face and a circular recess at the axis.

vertical web, another plate-like member 'overlying said first-mentionedmember, a bolt extending through the centers of said members andpivotally mounting the second-mentioned memher on the first-mentionedmember, the opposing faces of said members being disposed in a commonhelix, there being means accessible from the outside of the truck forrotating said secondmentioned member on said first-mentioned meme herabout the axis of said helix to vary the overall thickness of saiddevice, there being means 45., 6. In combination, arailway vehicletruck' for holding said members against rotation from the desiredadjustment.

8. In combination, a railway vehicle truck frame part, a relativelymovable truck bolster part extending alongside thereof, one of saidparts including an upright wall, a chafing plate member on said wallopposing the other of said parts, a bolt passing through said member andwall, a spring compressed between said wall and a shoulder on said boltfor thrusting said member towards said wall, said member being movableabout said bolt as an axis, there being means for shifting said memberlongitudinally of said bolt, against the pressure of said spring, whensaid member is moved about said axis, there being means for holding saidmembers against rotation from the desired adjustment.

9. A railway truck frame having a bolster opposing face including ahelical portion inclined from the remainder of said face and arranged tomount a bolster engaging chafing plate member having a similarlyinclined bearing face.

10. A railway truck frame having a bolster opposing face with a portionhaving a bearing surface inclined from the remainder of said face in.

11. A railway truck frame having a bolster opposing face with a portionhaving a bearing surface inclined from the remainder of said face in theform of a helix and said face being apertured at its axis to receive achafing plate mounting element, there being a lug projecting from saidportion and apertured to receive a chafing plate positioning bolt.

12. A railway truck frame having a bolster opposing wall provided with aboss having an outwardly facing helix-like bearing surface,- there beinga cup-like recess in said boss at its axis for mounting a coactingchafing plate trunnion, there being a lug of restricted area on saidwall extending radially of said boss and having a plu- 20 rality ofapertures for selectively receiving a chafing plate positioning bolt.

HARRY M. PFLAGER.

